On November 1, 2016, Josai University Educational Corporation (Chancellor Noriko Mizuta) held a film premiere of "Kocchi Bachan", a Japan-South Korea co-production made by Josai International University (Togane, Chiba Prefecture) to commemorate Josai University's 50th anniversary, and Dongseo University of Busan, South Korea, at the Tokyo Kioicho Campus 1st Building. The preview was attended by Dr. Jekuk Chang, President of Dongseo University, and an audience of approximately 160 staff members and students from the Josai International University Faculty of Media Studies, who celebrated the film's completion.

This is the second film co-production by the two universities, which have signed an academic exchange agreement. Their first project was entitled "Winter Fireworks", which was produced to commemorate the 20th anniversary of the establishment of Josai International University. The film "Kocchi Bachan" portrays family bonds of over a hundred years, focusing on the encounter of a female Japanese university student, who grew up in Kamogawa, Chiba Prefecture,whose great-grandmother came from Jejudo, South Korea, and an exchange student from Busan. The preparations for the film started in October 2015. Students studied approximately 100 years of Japanese and Korean modern history, and based their researched on many reference works. From April this year, video conferences were held to discuss the film plot, and film castings were held. The film script was written by Touma Nakagawa, a fourth year student at Josai International University, who was also the film director. It was also decided that a third year student, Kana Inoue, would play the main role of the female university student and Kim Hodong fom Donseo University would play the part of the exchange student. Junko Miyashita, who won the Blue Ribbon Award for supporting actress in the film "Kumokirinizaemon" (1978, directed by Hideo Gosha), was casted in the main role of Kocchi Bachan.
　 Nine student participants from Korea arrived in Japan on August 2, and filming took place from that day until the 12th, in Tokyo and in the Kamogawa area. The students hit it off immediately, and enjoyed a memorable time in Kamogawa in the heat of summer.

Before the film premiere, Chancellor Mizuta made the following address, "President Jekuk Chang has made time for us in his busy schedule, and has given us an opportunity to watch this film together. Please support this film as well, so that many people can watch it". The Chief of Lifelong Education on the Board of Education, Masanori Kurono, who came on behalf of Mayor Takao Hasegawa of Kamogawa, said, "We are grateful that you have set the film in Kamogawa. I would like to arrange an opportunity for the citizens and children to watch the film there as well".

After the approximately 44-minute premiere ended, President Jejuk Chang said, "The script and performance were so outstanding that it is hard to believe that the film was made by students. I believe this collaboration project between Japan and South Korea has enabled the students to understand each others' culture, history, tradition and perspectives. I believe that in a globalized world, cultures necessarily interact.Josai University, Josai International University and Dongseo University are like sisters. I would like to continue our endeavors together."